Secretkeeper implementation: in-HAL/nonsecure impl am: eb223ba883

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2797756

Change-Id: I7150b06fd6ade851f50722efaf1fa53630d3c00e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>